Weighing-scale.



N 793,537. PATENTED JUNE 27, 1905.

0 0. W. McKEE.

WEIGHING SCALE.

' APPLICATION FILED NOV.2, 1903. RENEWED MAY 20,1905.

UNITED STATES Patented June 27, 1905.

CLARENCE WV. McKEE, OF EL PASO, TEXAS.

WEIGHING-SCALE.

SPECIFICATION forming part of Letters Patent No. 793,537, dated June 27,1905. Application filed November 2, 1903. Renewed May 20, 1905. SerialNo. 261,424.

1'0 (I/Zl whom, it may concern.-

Be it known that I, CLARENCE W. MoKEn, a citizen of the United States,residing at El Paso, in the county of El Paso and State of Texas, haveinvented new and useful Im provements in Weighing-Scales, of which thefollowing is a specification.

This invention relates to weighing-scales.

The object of the invention is in a ready, simple, thoroughly eflicient,and practical manner to prevent overweighing, with consequent loss tothe seller, and at the same time notify a purchaser that correct weighthas been given; furthermore, positively to eliminate all frictionbetween the operative parts of the attachment, thus to obviate anyinterference with the correct weighing operations of the scale.

With the above and other objects in View, as Will appear as the natureof the invention is better understood, the same consists, generallystated, in a signaling device for weigh-- ing-scales embodying in itsconstruction a contact movable with the pan-support and a make-and-breakdevice supported by a fixed part of the scale comprising a cup or holderto contain a body of mercury to be engaged by the contact when thepan-support descends, the said contact and mercury-holder being incircuit with a source of electrical energy including a bell or othermeans for giving an audible signal.

The invention consists, further, in the novel construction andcombination of parts of a signaling device for scales, as will behereinafter fully described and claimed.

In the accompanying drawing, forming a part of this specification, andin which like characters of reference indicate corresponding parts,there is illustrated one form of embodiment of the invention capable ofcarrying the same into practical operation, it being understood that theelements therein exhibited may be varied or changed as to shape,proportion, and exact manner of assemblage without departing from thespirit thereof, and in this drawing the figure is a view in sideelevation. partly in section, exhibiting an ordinary balance-beamweighing-scale and 1 connections between it and the signaling mechanism.

In the present instance the improvements are shown as combined with anordinary balance-beam weighing-scale A, this for the purpose ofconvenience of illustration; but it is to be understood that theinvention is not to be limited to this form of scale alone, as theimprovements are equally adaptable to other forms and may be appliedthereto without departing from the spirit of the invention. The scale isherein shown as resting upon a counter B merely to facilitate anunderstanding of theinvention, it of course being understood that thedevice can be sold as an article of manufacture and attached to anyordinary scale. The signaling device is placed beneath the counter inorder to prevent its being tampered with by unauthorized persons.

To the pan-support 1 of the scale, and at or near the lower end thereof,is secured a collar 2, between which and the said support is interposedsuitable insulating material 3 in the nature of a gasket or ring. Fromone side of the collar 2 extends a downward-projecting contactpoint 3,which may be of any suitable material, preferably of platinum on accountof its non-destructive qualities, said contact being adapted to enter acup or holder 4, containing a body of mercury 5, said cup being carriedby or integral with a collar 6, secured to one of the scale-uprights 7and insulated therefrom by suitable insulating material 8. The level ofthe mercury in the cup will be sufficiently removed from the upper endthereof to permit the contact to move a sufficient distance downwardbefore engaging therewith to insure down weight; but in the event ofoverweight the contact will by remaining in the mercury cause acontinuous sounding of the alarm or signal until the overweight has beenremoved. Each collar has connected with it a conductor 9 and 10,respectively, constituting a circuit in which is included an ordinaryelectric bell 11, the terminals of the circuit being connected with asuitable source of electrical energy, such as a plurality of dry cells12, as clearly shown.

The device of this invention, while exceedport being provided with acontact-point and the collar on the scale-upright having a cup or holderto contain a body of mercury to be engaged by the contact-point, and asignaling device in electrical circuit with the two collars.

In testimony whereof I have hereunto set my hand in presence of twosubscribing \vitnesses.

CLARENCE WV. MoKEE. Witnesses:

GREENBERY BRIGHT, C. E. Molina.

